Two wires of copper have lengths L and 2L and cross sectional area 2A and A, respectively. The ratio of their specific resistance would be- |
1 : 2 1 : 8 1 : 1 1 : 4 |
1 : 1 |
The correct answer is Option (3) → 1 : 1 Specific Resistance of a material (ρ) is - $ρ=R\frac{A}{L}$ However, Specific Resistance is an material property and therefore would remain same for both the copper wire. |